TotalFreedom has a diverse set of phrases set to distinguish various events and things occuring throughout the server.
Any player that is present on the server. "OP", in this case, means "Operator". "OP" can also be used to describe very over-powered weaponry and armor, which may be used in combat.
Griefers are players that set out to destroy buildings made by other OPs. This can result in two outcomes. The right thing to do would be to stay calm and call out for an admin or report the player, and the wrong thing to do would be to give the griefer what they want, and start raging.
ill get back to this later -ex